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Short spans of geologic time

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Christop Hodkiewicz

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Q: Organism that formed index fossils when?
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What is fossils organisms that lived a short period of time called?

They are called index fossils.


When did organisms that formed index fossils?

Short spans of geologic time


What fossils formed when an organism dissolves and leaves an empty space in a rock are called?

Voids left behind by once present fossils are called 'trace fossils'.


Fossil used to compare the relative ages of fossils?

index fossils


What are index fossils and how are they used to determine the absolute age of sedimentary rocks?

Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.

Related questions

What is fossils organisms that lived a short period of time called?

They are called index fossils.


When did organisms that formed index fossils?

Short spans of geologic time


Are preserved animal tracks index fossils?

According to the definition of "Index Fossils" the answer is no. The definition of an "Index Fossil" is - remains of an organism that lived in a particular geological age. While the track itself may indicate the age of sediment, it is not a fossil.


Why are index fossils useful for figure out the age of a set of disturbed rock layers?

index fossils are useful for figuring out the age of a set of disturbed rock layers by index fossils are used to determine when rock layers were formed so if they were used to figure out the age of a set of disturbed rock layers than they can also figure out when they were formed .


What three condition must a fossil meet in order to be an index fossils?

Relatively short rime span. To be an index fossil, a fossil organism must be easy to identify and many fossils of that organism must exist. You are using the 7th grade interactive reader...... Naughty naughty naughty


How are trace formed?

Trace fossils are formed when an organism leaves a trace; such as a footprint, a bite mark, or even poo.


Fossils formed when an organism dissolves and leaves an empty space in a rock are called?

Voids left behind by once present fossils are called 'trace fossils'.


What fossils formed when an organism dissolves and leaves an empty space in a rock are called?

Voids left behind by once present fossils are called 'trace fossils'.


How do fossils form through permineralization and carbonization?

Permineralized fossil are formed when dissolved minerals precipitate from a solution in the space occupied by the organism's remains.


How are trace fossil formed?

Trace fossils are formed when an organism leaves a trace; such as a footprint, a bite mark, or even poo.


Fossil used to compare the relative ages of fossils?

index fossils


What are index fossils and how are they used to determine the absolute age of sedimentary rock?

Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.